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Rebuilt Crankshaft
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 Union QD-200 Quintuplex Pump Rebuilt Crankshaft US $9,500.00 |
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 Ajax EA30 7 1/4 X 8 Rebuilt Crankshaft US $1,400.00 |
 Kubota 3200E Rebuilt Crankshaft .020 Undersize US $950.00 |
 Bethlehem TP-3 Rebuilt Crankshaft. US $1,000.00 |
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In an effort to increase productivity, and profits, many aftermarket automotive performance engine component manufacturers in the United States have discontinued supplying important internal engine components such as crankshafts and connecting rods. A lack of available parts can create unique challenges for those in the performance and restoration engine rebuilding industry.
One engine model that has seen a significant reduction of available parts is the turbo Buick 3.8L engine. Popular aftermarket engine component manufacturers such as Eagle have discontinued selling forged connecting rods for these engines. Other options exist for the engine builder, but the reduced competition has driven up costs.
Crankshafts, once sold by both Eagle and Cat are no longer available. Those wishing to rebuild a Buick V6 engine, with a steel forged crankshaft, must look to other sources to assemble a forged rotating assembly for these high performance engines. Since a properly tuned turbo Buick engine can easily run nine seconds in the quarter mile, with the right internal engine components, the crankshaft is the most important rotating component of an engine that is being built to handle high horsepower.
Few aftermarket crankshaft suppliers exist for the 3.8L turbo charged Buick V6 engine. However, exporting countries such as China have seized on the opportunity to manufacture their own crankshafts for turbo Buicks. At the present time, Chinese manufacturers are exporting both 3.400 standard stroke and 3.625 stroker crankshafts to the United States.
We have inspected a good number of aftermarket crankshafts from China. Overall, they appear to be a solid piece. However, a few areas of concern should be addressed by those purchasing one of these cranks. The turbo Buick crankshafts from China typically have a crank keyway that must either be modified or a special key would need to be used for the harmonic balancer. Another area of the forged crankshaft that may need additional machine work is the flywheel flange area. Unlike American made crankshafts, the Chinese version has a large radius where the flywheel mounts at. This can cause the flywheel to not seat properly against the rear flange. Either the flywheel needs to be modified or the radius machined out of the rear crankshaft flange.
The finish grind on Chinese made crankshafts is average at best. Crank pin and main journal taper has checked within tolerance on most pieces. Journal out of round was limited and within specification on most pieces. We did need to complete a crankshaft grinding operation on a few of the crankshafts we inspected. But the overall majority of these crankshafts are within tolerance and have specifications which make them suitable for high performance applications.
It is important to note that the Chinese made 3.8L forged crankshafts should be internally balanced. While internal balancing is common for most performance applications, customers must be advised that additional expenses involving harmonic balancer and flexplate balancing or replacement will be required.
Overall, the quality and dependability of Chinese made crankshafts appears average. When customers are faced with few affordable choices for a forged crankshaft for their turbo Buick engine, imported automotive crankshafts have proven to be a dependable product that does not bust the budget.
John Smith is an ASE Certified Engine Machinist at W. John is responsible for each remanufactured crankshaft that has been straightened, welded or ground at the Crankshaft Company. His other duties include other machining operations as needed in his automotive machine shop.
Transmission Replacement
Transmission in automobiles is a system of parts connecting the engine to the wheels. Suitable torque or turning force is generated by the engine only within a narrow range of engine speeds i.e., rates at which the crankshaft is turning. However, the wheels must turn with suitable torque over a wide range of speeds. While its speed is held roughly constant, the engine turns an input shaft on the transmission whose output shaft can be adjusted to turn the wheels at an appropriate speed.
Majority of the car manufacturers use interchangeable transmissions in different models, and often different manufacturers use the same transmission in their respective products. Today, an automatic transmission becomes more reliable but it is still most-easy-to-break and costly to repair part of the vehicle. The transmission is very sensitive part of the car so if it is used roughly, it will destroyed easily.
Improper fluid type can also damage the transmission. Before buying a used car, one of the most important parts that customer must check is its transmission. It is really a must that he/ she will do the full inspection before taking the final decision about the car.
If car starts responding strangely and start hearing strange sounds while driving then the car repair is necessary so take it for diagnostic check up and hoping that the problem is simple and inexpensive to fix.
A trustworthy professional automotive mechanic will immediately warn against replacing the auto transmission with just any used car transmission. And customer has no way of knowing how bad it had been used by the previous owner or what defects it has until.
Most of general transmission service provider will replace a bad transmission system with one that has been professionally rebuilt by expert who is specialized in auto transmissions, and charge the customer with higher cost but providing the low quality transmission system.
Transmission911 based in Houston, Texas has fully trained transmission experts who have years of experience in transmission replacement and transmission installation. Transmission911 gives access to communicate with trained professional who will make sure that customer gets the right transmission replacement.
About the Author
For more information please visit http://www.transmission911.com
personal watercraft crankshaft tools?
I am trying to locate the neccessary tools to rebuild a crankshaft for a 1998 yamaha gp 1200.
Hi Scott,,
Here's one place with generic crank tools,
http://www.victorspecialtytools.com/crank.html
Many years ago,I was one of a very few Authorized Kawasaki 3 Cyl crank rebuilders in USA.
Triples are nuisance to fool with,,,tedious.
I had all the Kaw factory tools,,
but usually used homemade tools,,plain basic stuff.
It was faster,easier,and the cranks went together lots straighter requiring far less final alignment.
Point is,all the exotic specialized stuff seems real impressive but is really not necessary to do a proper job.
Just for what its worth,,,here's some Cranks I came across while looking for tools.
Seems there are 2 Different GP1200's,,
power valve & NON-pv.
I'm not certain which is what.
Far as economy,,for a single crank replacement/one-time repair,,,,just buying a crank appears to be cheaper than gearing-up to rebuild your own.
http://www.webrats.com/a/
WISECO HotRods - Crankshafts
Item List price Sale price
Yamaha 1100 triple 1995-97 $599.95 $539.95
Yamaha 1200 triple 1999 $599.95 $539.95
These are ALL NEW crank assemblies, complete with Hot Rods connecting rods, crankshaft webs, and main bearings.
Factory assembled to within .001, ready to install and rebuildable.
.............................................................
Those are good cranks,,NEW,,,and not much more $$$
than rebuilt SBT cranks.
(Which some folks claim are of dubious quality,,,which is "normal" for rebuilt parts)
http://www.sbtontheweb.com/Merchant2/merchant.mvc?Screen=CTGY&Category_Code=20-4
All just info,,for what it's worth,,
Hope any of it is of some use to you.
1993 Chevrolet S-10 LT 4 x 4 from North America - Comments
First year of the 4.3 vortec's; apparently later years 94-98 have the problems worked out. Bought it used with a warranty: had to use it in one week because it needed new valve seats.
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